Comments

Adjust lower leg brace so pressure is evenly distributed
on thigh pad. Begin with body weight and add additional weight
gradually to allow lower back adequate adaptation.
Maintain barbell's position on back of shoulders when upper body
is lowered. Do not pause or bounce at bottom of lift. Do not
lower weight beyond mild stretch throughout hamstrings and low
back. Full range of motion will vary from person to person. Also
see Barbell Back
Extension and Barbell Back
Raise.